Geothermal Energy as a Renewable Power Source
Geothermal energy is heat energy extracted from the earth's core. The earth's core can reach temperatures of 4,000-7,000°C! This heat can be harnessed to spin generators for electricity or for direct heat applications like heating buildings or greenhouses.
Volcanic regions such as Iceland, Kenya and the Philippines produce very high-temperature geothermal resources.
High and mid-grade geothermal heat is located along active tectonic fault lines, such as California and the Ring of Fire. The deeper faults provide pathways for the heat to rise closer to the earth's surface.
Heat rising from the earth's core can become captured under a deep blanket of shale, such as the Western Sedimentary Basin. This type of geological phenomenon creates mid-grade geothermal temperatures which can be found in the Clarke Lake reservoir in Northeastern BC and across many countries in Europe.
Radiogenic heat is caused by the decay of naturally occurring radioactive isotopes. This can create low-grade geothermal resources. This can be found in the Canadian Shield and parts of Australia. DEEP in Southern Saskatchewan is an example of a radiogenic heat source.
The geothermal industry continues to advance, as technology progresses it will be easier to access this resource.
Geothermal energy provides clean baseload power, which means it can produce electricity 365 days, 24/7. The footprint of geothermal facilities is also relatively small for the amount of electricity produced, overall contributing to a small environmental impact.
Yes, geothermal is a renewable energy source. The reservoir needs to be appropriately managed by monitoring the reservoir and reinjecting brine at the correct rate to maintain the longevity and pressure of the resource.
The carbon emissions from geothermal energy are very low compared to other energy sources. Tu Deh-Kah Geothermal is also relatively low because its binary cycle facility is closed-loop and does not emit excess steam. Tu Deh-Kah Geothermal minimizes its environmental footprint because it is located on a brownfield site and maximizes existing roads and infrastructure use.